linux-kernel - [PATCH v2 1/4] power: supply: core: Add additional health status values

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Message-Id: <20250429003606.303870-1-W_Armin@gmx.de>
Date: Tue, 29 Apr 2025 02:36:03 +0200
From: Armin Wolf <W_Armin@....de>
To: hdegoede@...hat.com,
	ilpo.jarvinen@...ux.intel.com
Cc: sre@...nel.org,
	platform-driver-x86@...r.kernel.org,
	linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/4] power: supply: core: Add additional health status values

Some batteries can signal when an internal fuse was blown. In such a
case POWER_SUPPLY_HEALTH_DEAD is too vague for userspace applications
to perform meaningful diagnostics.

Additionally some batteries can also signal when some of their
internal cells are imbalanced. In such a case returning
POWER_SUPPLY_HEALTH_UNSPEC_FAILURE is again too vague for userspace
applications to perform meaningful diagnostics.

Add new health status values for both cases.

Signed-off-by: Armin Wolf <W_Armin@....de>
---
Changes since v1:
 - rename "Fuse blown" to "Blown fuse"
 - rename "Cell imbalanced" to "Cell imbalance"
---
 Documentation/ABI/testing/sysfs-class-power | 2 +-
 drivers/power/supply/power_supply_sysfs.c   | 2 ++
 include/linux/power_supply.h                | 2 ++
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power
index 2a5c1a09a28f..be8be54b183d 100644
--- a/Documentation/ABI/testing/sysfs-class-power
+++ b/Documentation/ABI/testing/sysfs-class-power
@@ -456,7 +456,7 @@ Description:
 			      "Over voltage", "Under voltage", "Unspecified failure", "Cold",
 			      "Watchdog timer expire", "Safety timer expire",
 			      "Over current", "Calibration required", "Warm",
-			      "Cool", "Hot", "No battery"
+			      "Cool", "Hot", "No battery", "Blown fuse", "Cell imbalance"
 
 What:		/sys/class/power_supply/<supply_name>/precharge_current
 Date:		June 2017
diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
index edb058c19c9c..2703ed1dd943 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -110,6 +110,8 @@ static const char * const POWER_SUPPLY_HEALTH_TEXT[] = {
 	[POWER_SUPPLY_HEALTH_COOL]		    = "Cool",
 	[POWER_SUPPLY_HEALTH_HOT]		    = "Hot",
 	[POWER_SUPPLY_HEALTH_NO_BATTERY]	    = "No battery",
+	[POWER_SUPPLY_HEALTH_BLOWN_FUSE]	    = "Blown fuse",
+	[POWER_SUPPLY_HEALTH_CELL_IMBALANCE]	    = "Cell imbalance",
 };
 
 static const char * const POWER_SUPPLY_TECHNOLOGY_TEXT[] = {
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 888824592953..69df3a452918 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -71,6 +71,8 @@ enum {
 	POWER_SUPPLY_HEALTH_COOL,
 	POWER_SUPPLY_HEALTH_HOT,
 	POWER_SUPPLY_HEALTH_NO_BATTERY,
+	POWER_SUPPLY_HEALTH_BLOWN_FUSE,
+	POWER_SUPPLY_HEALTH_CELL_IMBALANCE,
 };
 
 enum {
-- 
2.39.5